Apparatus for making cement



Oct. 13, 1931. H VANDERWERP 1,826,847

APPARATUS FOR MAKING CEMENT Filed April 4, 1928 1% 26 v jggnj 2 Sheets-Sheet 1 I NV EN TOR.

ATTORNEY.

Oct. 13, 1931. H. VANDERWERP APPARATUS FOR MAKING CEMENT Filed April 4, 192 8 2 Sheets-Sheet 2 INVENTOR.

A TTORNEY.

Patented Oct. 13, 1931 A UNITED STATES PATENT AOFFICE HENRY VANDERWERP, F MANITOWOO, WISCONSIN, ASSIGNOR TO ROTARY PRESSURE COOLER COMPANY, OF MANITOWOC, WISCONSIN, A CORPORATION OF WISCONSIN APPARATUS FOR MAKING CEMENT Application filed April 4,-

The invention relates to an improved method and apparatus for making cement,

the primary object of the invention being to provide a method and apparatus of the class described by means of which cement may-be manufactured with improved efiiciency.

Another object of the invention is the provision of means whereby fuel may be economized in the manufacture of cement.

Another object of the invention is the prolongation of the life of the apparatus employed in makin cement.

Other objects will appear hereinafter.

The invention consists in the method and 16, apparatus hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming part of this specification and in which b Fig. 1 is a partial longitudinal elevation, with portions broken away and shown in section, of the improved apparatus adapted for use in the improved method;

Fig. 2, an enlarged partial longitudinal section through a portion of the cooling chamber employed in the apparatus;

Fig. 3, a transverse section-taken substantially on line 33 of Fig. 2;

Fig. 4, a transverse section taken substantially on line 44 of Fig. 2; v

Fig. 5, a section taken substantially on line 55 of Fig. 3; v

Fig. 6, a section taken substantially on line 36 66 of Fig. 7;

Fig. 7, an interior partial plan view of tuyre blocks employed in the apparatus; Fig. 8, a section of a juncture block employed in the apparatus 5 and Fig. 9, a view at right angles to Fig. 8.

The preferred form of construction as illustrated in the drawings comprises a revolving kiln 10 arranged to be supplied with fuel through a fuel her or housing 12 and a revolving cooling chamber 13 communicates with the lower portion of said housing. The revolving kiln 10, the fuel pipe 11, the housing 12 and the cooling chamber 13 are the usual members of a ipe 11. The kiln 10 com-- -4 municates with t e upper portion of a cham- 1928. Serial No. 267,351.

usual form of cement making apparatus combined and operating together in the usual way, the'presentinvention being in the nature of improvements and additions to the kiln 10 and cooling chamber 13."

Secured to the inner surface'of a portion of both the kiln 10 and the cooling chamber 13 are linings a consisting of a plurality of tuyere blocks 14, arranged in series both'circumferentially and longitudinally of said kiln and cooling chamber, respectively. As shown, the lining for the kiln 10 is applied to the end thereof immediately adjacent the housing 12, as shown in Fig. 1, while the lining for the cooling chamber 13 is applied to a portion thereof intermediate its ends, also as shown in Fig. -1.

Each of the tuyere blocks 14 is secured in place on the inner periphery of the corresponding chamber by means of bolts 15 passing through the shell of the chamber, as shown. a

Formed on the advancing edge of each tuyere block 14 is an enlargement or boss 16 I provided with an air passage-way 17 and shaped to form a radially disposed surface or ledge 18 for lifting the material in the chamber as said chamber rotates, as will be readily understood by those skilled in the art. The air passages 17 of tuyereblocks 14 in each longitudinal series are in open communicationwith one another, the passages in intermediate blocks. extending entirely through the same from end to end, but the remote ends of the extreme tuyere blocks of each series being preferably closed.

Inthe preferable construction shown, the tuyere blocks 14 are also secured to the shells of the kiln 10 and cooling chamber 13 by key blocks 20 which engage notches 19 formed in the tuyre blocks 14 at the ends of the enlargements or bosses 16, and which are se- 7 to 9 of the drawings, the key blocks are secured to said shells by bolts which engage bolt holes and recesses 21 formed in said key blocks in register with corresponding holes with the passageway 17 in said enlargement or boss, and a relatively thin solid portion 22, said portions 22 and 22 being separated bya wall 24; formed in which are jet orifices 25 which communicate with the chamber-23 in the hollow portion 22 of the tuyere block and are directed over and across the surface of the relatively thin portion 22 thereof, ex-

: posed within the kiln 10 and cooling chamber 13, respectively. Also, as said blocks are installed for use, the shoulders 24 face away from the direction of rotation of said kiln and cooling chamber, thus effectively obviating any tendency of the granular material undergoing treatment falling by gravity into the jet orifices 25 and clogging the same. As shown, the wall 24 extends diagonally. from the point of juncture of the portion 22 adjacent one end of the block wlth the enlargement or boss 16, to a point in the side of said tuyere block remote from said enlargement or boss and adjacent the opposite end of said block.

The pile of cement clinker being treated in each of the chambers is indicated at 26 and it will be noted that by the arrangement described a portion of the tuyere blocks 14: will be always under or covered by this pile of material. As the chamber revolves, a certain portion of this material will be lifted and elevated by the lifting action of the surfaces 18 in conjunction with the forms of the blocks 14 until such an inclination is assumed by the surfaces 18 as to cause said material to fall therefrom, thereby performing the function of the ordinary and usual lifting blades in this form of apparatus. J

The arrangement is such that air is passed through the tuyere blocks covered by the pile of material 26 and discharged through the orifices 25 longitudinally into the material, whereby it will have prolonged and intimate contact therewith. Also, clogging of the orifices 25 by material falling into the'same by gravity, is prevented.

As a means of supplying air to the tuyere blocks, each tuyere block in one circumferential band or series is provided with a radially extending nipple or pipe section 27 exmea er tending through the shell of the corresponding chamber and also through a circumferential reinforcing ring 28 as shown.

An air housing 29 is arranged to contact with the ring 28 substantially throughout the areaof the chamber covered by the pile of material 26. The housing 29 is yielding'ly mounted on two weighted levers 30 and 31 so as to be yieldingly pressed against the ring 28 as the same revolves.

To prevent undue escape of air from the housing 29, the ring 28 is provided with cir-.

cumferential grooves 32 into which the edges of the housing 29 fit as indicated in Fig. 5. The housing 29 is provided with a nipple 33 connected by an air hose 34 with a source of supply of air under pressure, not shown, by means of which air under pressure may be supplied to the housing 29 and through it to the tuyere blocks 14 during the normal op- 'eration of the apparatus.

llfi the normal operation of the apparatus, the usual slurry dry raw material is fed to the kiln 10 in the usual way, said kiln being also supplied with fuel through the fuel pipe 11 and combustion being promoted in said kiln in the usual way.

To further augment and promote combustion, fuel may be mixed with the cement ingredients within the kiln and before introduction thereinto. As the material in the kiln proceeds in the usual way therethrough, it ultimately passes through the portion thereof lined with the tuyere blocks 14 just before discharge into the housing 12. .Here the clinker which has been transformed partially into cement in the kiln 10 is first subjected to further and complete combustion of any fuel remaining therein by the passage of the air through the corresponding tuyere blocks. After this combustion has been completed, the passage of the air through the lowermost tuyere blocks has a tendency to start the cooling of the cement clinker.

1t will also be noted that the passage of the air through the tuyere blocks has a tendency to cool said tuyere blocks and. thus prevent END END

injury thereto from the intense heat to which they are subjected.

As the clinker proceeds through the cooling chamber 13 in the normal operation of the apparatus, it is again subjected and, more intensely, to the cooling action of the air passing tgfough the tuyere blocks in the cooling cham er. The incoming air, as it cools the clinker, is itself heated thereby, and, as

there is normally a general upward draft or passage of air from the cooling chamber 13 into and through the kiln 10, this preheated air tends to promote combustion in the kiln and thereby economizes fuel.

The passage of the air through the tuyere blocks in the-coolingchamber 13 also tends from the intense heat. 7

to cool said blocks andprevent injury thereto By means of the apparatus described cement may be produced with great efliciency and economy of fuel and the life of the working parts greatly prolonged. L

While I have illustrated and described the preferred apparatus and method of procedure for carrying on the invention, these may be varied without departing from "the spirit of the invention.

I therefore do not wish to be limited to the precise details set forth, but desire to avail myself of such variations and modifications as fall within the sec e of the appended claims.

I claim: I

1. Apparatus for the purpose specifiedcomprising a rotatable shell, and a lining therefor consisting of hollow tuyre blocks each provided with a passage-way which communicates with the chamber therein, said tuyere blocks being arranged in series with the passage-ways of blocks of each series in commuincation with one another, means for securing: said tuyre blocks to said shell, and

means for supplying air under pressure, to said tuyere blocks, said block being provided with discharge orifices which communicate which the extreme tuyre blocks 0 each series are 0886.. 7

. under the passage-ways o with the chambers therein, respectively.

2. Apparatus for the purpose specified, comprising a rotatable shell, and a lining therefor consisting of hollow tuyere blocks each comprising an enlargement shaped to form a liftingledge, said enlargement being provided with a passage-way which communicates with the chamber in said tuyere blocks, said tuyere blocks bein arranged in series with the passage-ways of blocksof the same series in communication with one another, means for securing said tuyre blocks to said shell, and means for supplying air plressure to 'said tuyere blocks, said tuyere b ocks being provided with discharge orifices which communicate'with the chambers therein, respectively.

3. Apparatus for the purpose specified, comprising a rotatable shell and a linin therefor consistin of tuyere blocks, each comprising a holfiiw portion, a relatively thin solid portion, and an sha ed .to form a-lifting ledge, provided wit a passage-way WhlCll communicates with the chamber in the hollow portion thereof, said blocks bein arranged in series with f blocks of the same series in communicatlon with one another and the remote ends of the passage-ways in the ex 'treme blocks of each series being closed,said tuyere blocks, respectively,

being .provided with jetorifices which communicate withthe chambers therein. I

4. Apparatus as specified in claim 1, in the remote ends of the assage-ways in which ke register with -the enlargement 5. Apparatus as specified in claim 1, k

which the means for supplying air to the, tuyre blocks is operative only'in that circumferential portion of the surface of the shell which, 1n operation, is positioned in a predetermined sector of the circular path of movementpf said shell. 1

6. Apparatus as specified in claim 1, in blocks are secured to the inner surface 0 the shell which interlock with correspondingly shaped recesses formed in adjacent ends of ad acent tuyere blocks.

7. Apparatus as specified in claim 1, in which ke blocks are secured to the inner surface 0 the shell which interlock with correspondingly shaped recesses formed in adjacent ends of adjacent tuyere blocks in line with the communicatin passage-ways in said series of tuyere bloc s, respectively, and which are provided with passage-ways which passage-ways in adjacent tuyere blocks.

8. Apparatus as specified in claim 2, in which ke blocks are secured to the inner surface 0 the shell which interlock with correspondingly shaped recesses formed in adjacent ends of the bosses of adjacent tuyere blocks, and which are provided with passageways which communicate with and connect the passage-ways in the bosses of said tuyere bloc s.

9. Apparatus for the purpose specified comprising a rotatable shell and a lining therefor consisting of tuyere blocks vprovided with passage-ways, said tuyere blocks being arranged in series with the-passage-ways of blocks of the sameseriesin communication with one another, means for securing said tuyre blocks to'said shell, and means for supplying air under pressure to saidtuyere blocks, each of said tuyere blocks comprising a hollow portion the chamber in which communicates with the air supply passage-way therein, anda relatively t in solid portion,

a said hollow and solid portions being separatwith jet orifices ed by a shoulder provided the chamber in which communicate with said hollow portion and which are directed alon the surfaces of said relatively thin portion exposed within said shell. 10. Apparatus as specified in claim 9, in

which the tuyere blocks are installed for use with the shoulders separating the hollow and solid portions thereof facing rearwardly relative to the contemplated direction of rotation of the shell in operation.

11. A paratus as specified in claim 9, in which tl ie shoulders which separate the surfaces of the hollow and solid portions of said tuyre blocks exposed within said shell when installed for use extend diagonally of said blocks.

Inwitness that I claim the foregoing as my invention, I a of March, 1928.

VANDERWERP.

fiix my signature this 31st day 

